2221212212123 has 2 divisors, whose sum is σ = 2221212212124. Its totient is φ = 2221212212122.

The previous prime is 2221212212099. The next prime is 2221212212171. The reversal of 2221212212123 is 3212122121222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2221212212123 - 2²⁴ = 2221195434907 is a prime.

It is a super-2 number, since 2×2221212212123² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2221212262123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110606106061 + 1110606106062.

It is an arithmetic number, because the mean of its divisors is an integer number (1110606106062).

Almost surely, 2^{2221212212123} is an apocalyptic number.

2221212212123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221212212123 is an equidigital number, since it uses as much as digits as its factorization.

2221212212123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 23.

Adding to 2221212212123 its reverse (3212122121222), we get a palindrome (5433334333345).

Subtracting 2221212212123 from its reverse (3212122121222), we obtain a palindrome (990909909099).

The spelling of 2221212212123 in words is "two trillion, two hundred twenty-one billion, two hundred twelve million, two hundred twelve thousand, one hundred twenty-three".